package com.zenithsun.common.util;

import javax.servlet.http.HttpServletRequest;

import com.syzg.core.util.StringUtil;

public class WebUtil {

	public static String getIpAddr(HttpServletRequest request) {
		String ip = request.getHeader("X-Real-IP");
		if (StringUtil.isNotBlank(ip) && !"unknown".equalsIgnoreCase(ip)) {
			return ip;
		}
		ip = request.getHeader("X-Forwarded-For");
		if (StringUtil.isNotBlank(ip) && !"unknown".equalsIgnoreCase(ip)) {
			// 多次反向代理后会有多个IP值，第一个为真实IP。
			int index = ip.indexOf(',');
			if (index != -1) {
				return ip.substring(0, index);
			} else {
				return ip;
			}
		} else {
			return request.getRemoteAddr();
		}
	}

}
